Does anyone have these SFCs or has anyone heard anything about them? I'm thinking about putting them on my car. If anyone does have them, how do you like them/how well do they fit? Also, any crazy mods needed to make them fit?

 

come on some body has have to run them on our board.

 

I've got Competition Engineering sfc's. They're the bolt in type. They were very easy to install, and I had no problems with the stock exhaust clearing them. You can't even see them from the side once they're in.
After surfing the board here, I've come to realize that they're kinda small, and weld-ins are way better. I have a good excuse for using them...I got 'em from my dad for free!!
I personally noticed that my stb gave a more noticeable improvement than the sfc. Again, probably because the sfc are not the stongest ones out there.